-
Used to use Southwark a lot and it wasn’t too bad for traffic. If you were going north you could also go straight into a shared use ped bit of the city (I always turned left for lower Thames street) and going south it was handy for accessing the backstreets around GSS.
Tower bridge has always been horrible, imho, and Waterloo is just crappy for traffic at both ends. -
Southwark was my old fave (even though that was where I smashed my collar bone in 2017). Totally segregated, generally very safe and the north side lights are very cyclist friendly. You can avoid the worst bits of the approach by diverting along Great Guildford St - longer but less cyclists and left-hooking trucks.
That was when I went Penge, Crystal Palace etc to the City. Have switched now to Waterlink way, Catford, Nunhead, Bermondsey, London Bridge route which is very much more relaxed and easier on my f-ed knees.
I did Canada Water to Green Park for a while in The Before Times, tried various options and settled on Southwark Bridge pretty quickly. Now doing Greenwich to Liverpool Street and cross at Tower Bridge, it's grim unless you hit it at proper antisocial hours.